One thing it does is cast the PDF to grayscale to render for speed (lawyers rarely care about the color of a legal doc in PDF), so perhaps I'll make that an adjustable setting which will trade off speed for clarity. Otherwise, it uses PDFium for PDF rendering so it should come out just as well as what you see in a Chromium-based browser.
Oh, yes, that is also a cheat code to render them quicker -- it downsamples the render to save time. That will improve in future versions as Tritium uses spare cycles to increase the resolution.
^ yes it does greedily ingest the PDFs to allow for instantaneous search. What it needs (and doesn't yet do) is at least multi-thread that parsing step to get a 2-4x speedup.
If this is Electron, try pdf.js - really good rendering, you can create a text layer (for text selection, etc). Probably the best result per effort you can get
IANAL: idk if lawyers dont do pdfs but tried some research papers and PDF rendering could use some love (MacOS)